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let web-decker scripts play audio in the background #86

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let web-decker scripts play audio in the background #86

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77fef0a
let web-decker scripts play audio in the background
Apr 2, 2024
202b03a
fix in chrome and improve in firefox
Apr 3, 2024
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20 changes: 17 additions & 3 deletions js/decker.js
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Original file line number Diff line number Diff line change
Expand Up @@ -3447,12 +3447,26 @@ mouse=(e,f)=>{
f(0|((e.pageX-c.x)/zoom),0|((e.pageY-c.y)/zoom),e.button!=0)
}
touch=(e,f)=>{const t=e.targetTouches[0]||{}; mouse({pageX:t.clientX, pageY:t.clientY, button:0},f);if(!set_touch)enable_touch=1}
let prev_stamp=null, leftover=0
let prev_stamp=null, leftover=0, scheduled_frame
document.onvisibilitychange=()=>{
if(document.hidden && scheduled_frame) {
cancelAnimationFrame(scheduled_frame)
schedule_frame()
}
}
schedule_frame=_=>{
// when a tab is in the background, requestAnimationFrame gets seriously throttled
// if a script in a deck like jankytunes is playing sound that messes it up
// so we should use setTimeout instead, which isn't throttled if audio is playing
if(document.hidden) setTimeout(() => loop(performance.now()), 1000/60)
else scheduled_frame = requestAnimationFrame(loop)
}
loop=stamp=>{
scheduled_frame=null
if(!prev_stamp)prev_stamp=stamp
let delta=(stamp-prev_stamp)+leftover, frame=1000/60, tc=0
while(delta>frame){tick(),tc++,delta-=frame;if(tc==5){delta=0;break}};leftover=delta
sync(),prev_stamp=stamp,requestAnimationFrame(loop)
sync(),prev_stamp=stamp,schedule_frame()
if(do_panic)setmode('object');do_panic=0
}
resize=_=>{
Expand Down Expand Up @@ -3626,4 +3640,4 @@ q('body').ondrop=e=>{

pushstate(lmenv()),load_deck(deck_read(q('script[language="decker"]').innerText))
const tag=decodeURI(document.URL.split('#')[1]||'');if(tag.length)iwrite(deck,lms('card'),lms(tag))
resize(),requestAnimationFrame(loop)
resize(),schedule_frame()